feat(cli): add Ccache support

[tido64]

Description

Add Ccache support

Test plan

CI should pass.

Stats from last run:

Cache directory:            /Users/runner/work/rnx-kit/rnx-kit/.ccache
Config file:                /Users/runner/work/rnx-kit/rnx-kit/.ccache/ccache.conf
System config file:         /opt/homebrew/Cellar/ccache/4.10.2_1/etc/ccache.conf
Stats updated:              Tue Oct  1 11:20:34 2024
Cacheable calls:            2216 / 2227 (99.51%)
  Hits:                     2216 / 2216 (100.0%)
    Direct:                 2216 / 2216 (100.0%)
    Preprocessed:              0 / 2216 ( 0.00%)
  Misses:                      0 / 2216 ( 0.00%)
Uncacheable calls:            11 / 2227 ( 0.49%)
  Called for preprocessing:   11 /   11 (100.0%)
Successful lookups:
  Direct:                   2216 / 2216 (100.0%)
  Preprocessed:                0
Local storage:
  Cache size (GB):           0.7 /  1.0 (74.96%)
  Files:                    6648
  Hits:                     2216 / 2216 (100.0%)
  Misses:                      0 / 2216 ( 0.00%)
  Reads:                    4432
  Writes:                      0