vdoctor: fix format, windows, tcc

[kbkpbot]

This PR will

1. create a nice looking vdoctor output;
2. fix windows ANSI->UTF-8 text encoding;
3. fix windows get CPU name;
4. add tcc -v to output;
5. add gcc,clang,glibc version detect;
6. add msvc version detect under Windows;
7. remove path contains non-ANSI character/spaces warning;
8. add free memory / total memory;
9. remove emcc detection;

New v doctor will output:

~/v/测试/dir contains spaces$ v doctor
|V full version      |V 0.4.9 3ed799e
|:-------------------|:-------------------
|OS                  |linux, Ubuntu 24.04.1 LTS
|Processor           |8 cpus, 64bit, little endian, Intel(R) Core(TM) i7-9700 CPU @ 3.00GHz
|Memory              |2.97GB/15.51GB
|                    |
|V executable        |/media/HD/github/kbkpbot/v/v
|V last modified time|2025-01-03 23:45:18
|                    |
|V home dir          |OK, value: /media/HD/github/kbkpbot/v
|VMODULES            |OK, value: /home/mars/.vmodules
|VTMP                |OK, value: /tmp/v_1000
|Current working dir |contains spaces, contains these non ASCII characters: [`测`, `试`], value: /home/mars/v/测试/dir contains spaces
|                    |
|Git version         |git version 2.43.0
|V git status        |weekly.2024.53-29-g1fbb77e1-dirty (2 commit(s) behind V master)
|.git/config present |true
|                    |
|CC version          |cc (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0
|gcc version         |gcc (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0
|clang version       |Ubuntu clang version 18.1.3 (1ubuntu1)
|tcc version         |tcc version 0.9.28rc 2024-07-31 HEAD@1cee0908 (x86_64 Linux)
|tcc git status      |thirdparty-linux-amd64 0134e9b9
|glibc version       |ldd (Ubuntu GLIBC 2.39-0ubuntu8.3) 2.39

By copy this vdoctor output to github, you will get a nice looking markdown format:

Linux:

V full version	V 0.4.9 3ed799e
OS	linux, Ubuntu 24.04.1 LTS
Processor	8 cpus, 64bit, little endian, Intel(R) Core(TM) i7-9700 CPU @ 3.00GHz
Memory	2.97GB/15.51GB
V executable	/media/HD/github/kbkpbot/v/v
V last modified time	2025-01-03 23:45:18
V home dir	OK, value: /media/HD/github/kbkpbot/v
VMODULES	OK, value: /home/mars/.vmodules
VTMP	OK, value: /tmp/v_1000
Current working dir	contains spaces, contains these non ASCII characters: [测, 试], value: /home/mars/v/测试/dir contains spaces
Git version	git version 2.43.0
V git status	weekly.2024.53-29-g1fbb77e1-dirty (2 commit(s) behind V master)
.git/config present	true
CC version	cc (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0
gcc version	gcc (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0
clang version	Ubuntu clang version 18.1.3 (1ubuntu1)
tcc version	tcc version 0.9.28rc 2024-07-31 HEAD@1cee0908 (x86_64 Linux)
tcc git status	thirdparty-linux-amd64 0134e9b9
glibc version	ldd (Ubuntu GLIBC 2.39-0ubuntu8.3) 2.39

Windows :

V full version	V 0.4.9 3ed799e
OS	windows, Microsoft Windows 10 企业版 LTSC 19044 64 位
Processor	16 cpus, 64bit, little endian, AMD Ryzen 7 7840H with Radeon 780M Graphics
Memory	1.36GB/27.69GB
V executable	D:\v\v\v\v.exe
V last modified time	2025-01-03 23:42:23
V home dir	OK, value: D:\v\v\v
VMODULES	OK, value: C:\Users\DDT.vmodules
VTMP	OK, value: C:\Users\DDT\AppData\Local\Temp\v_0
Current working dir	contains spaces, contains these non ASCII characters: [测, 试], value: D:\测试tmp\v test dir contain space
Git version	git version 2.43.0.windows.1
V git status	weekly.2024.53-19-g3ed799ef-dirty (2 commit(s) behind V master)
.git/config present	true
CC version	N/A
gcc version	N/A
clang version	N/A
msvc version	用于 x64 的 Microsoft (R) C/C++ 优化编译器 19.39.33523 版
tcc version	tcc version 0.9.28rc 2024-12-30_mob@68000c01* (x86_64 Windows)
tcc git status	N/A
glibc version	N/A

[JalonSolov]

Please also update the first comment here if you change the output, so people can see up front what they'll be getting. :-)

[spytheman]

There is no need to capitalize GCC. Leave it as just gcc version like the rest for consistency.

[kbkpbot]

So, remove emcc detection...

[spytheman]

No, emcc detection should stay.

It is useful for diagnosing problems when you want to compile games to wasm through:
v -os wasm32_emscripten examples/2048/

If that does not work, a report, including the output of v doctor can help pinpoint the problem.

[spytheman]

My comment before that was only about the capitalization of GCC, perhaps that was misleading, sorry. I did not meant to approve the removal of emcc - I thought it is just moved/reordered.

[spytheman]

Excellent work overall. The new look is much cleaner and easier and faster to scan at a glance.