(RFC) Add Git commit hash (if available) to .status all

[michaelortmann]

Found by: michaelortmann
Patch by: michaelortmann
Fixes:

One-line summary:
Adds Git commit hash (if available) to .status all

Additional description (if needed):
Think of this as additional version information, good for bug reports / debugging.

Please run misc/runautotools when testing / merging this PR

Test cases demonstrating functionality (if applicable):

.status all
[01:38:07] tcl: builtin dcc call: *dcc:status -HQ 1 all
[01:38:07] #-HQ# status all
I am BotA, running eggdrop v1.10.0+pythonfixes: 23 users (mem: 276k).
Online for 00:00 (terminal mode) - CPU: 00:00.01 - Cache hit: 66.7%
Configured with: 
Admin: Lamer <email: [email protected]>
Config file: BotA.conf
OS: Linux 6.12.8-arch1-1
Process ID: 253975 (parent 191282)
Tcl library: /usr/lib/tcl8.6
Tcl version: 8.6.16 (header version 8.6.16)
Tcl is threaded.
TLS support is enabled.
TLS library: OpenSSL 3.4.0 22 Oct 2024 (header version OpenSSL 3.4.0 22 Oct 2024)
IPv6 support is enabled.
Threaded DNS core is enabled.
Socket table: 20/100

Git commit: 4e5db356baa1b85a9e314988b06ebe844697c8e8
[...]

[michaelortmann]

If we had the commit hash in version info, it would show up in https://www.eggheads.org/uptime/, wouldnt that be nice?