Document list and edit subcommands

[kitsuyui]

Summary

• Document the existing mure list output modes in README.md.
• Document mure edit <name> and the editor selection order.
• Add core.editor to the sample .mure.toml configuration.

Verification

• cargo check
• cargo test
• cargo fmt --all -- --check
• cargo clippy -- -D warnings
• cargo build
• cargo audit
• git diff --check
• typos README.md
• actionlint -shellcheck=

[github-actions]

Code Metrics Report

	main (6f3b22d)	#845 (6b309f9)	+/-
Coverage	72.6%	72.6%	0.0%
Code to Test Ratio	1:0.0	1:0.0	0.0
Test Execution Time	23s	10s	-13s

Details

  |                     | main (6f3b22d) | #845 (6b309f9) | +/-  |
  |---------------------|----------------|----------------|------|
  | Coverage            |          72.6% |          72.6% | 0.0% |
  |   Files             |             18 |             18 |    0 |
  |   Lines             |           2010 |           2010 |    0 |
  |   Covered           |           1461 |           1461 |    0 |
  | Code to Test Ratio  |          1:0.0 |          1:0.0 |  0.0 |
  |   Code              |           2606 |           2606 |    0 |
  |   Test              |              0 |              0 |    0 |
+ | Test Execution Time |            23s |            10s | -13s |

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Reported by octocov