style: Use shfmt instead of bashate

[mathbunnyru]

High Level Overview of Change

https://github.com/openstack/bashate was last released on Oct 6, 2022
And what's most important, it's not auto-formatting, and the code ends up somewhat similar, but still not uniform.

https://github.com/mvdan/sh#shfmt is a much more modern alternative.
Let's use it.

Note: the second commit is a fully automatic change.

Context of Change

API Impact

• Public API: New feature (new methods and/or new fields)
• Public API: Breaking change (in general, breaking changes should only impact the next api_version)
• libxrpl change (any change that may affect libxrpl or dependents of libxrpl)
• Peer protocol change (must be backward compatible or bump the peer protocol version)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.4%. Comparing base (633ef47) to head (c3e39ee).

Additional details and impacted files

@@            Coverage Diff            @@
##           develop   #7326     +/-   ##
=========================================
- Coverage     82.4%   82.4%   -0.0%     
=========================================
  Files         1011    1011             
  Lines        76382   76382             
  Branches      7315    7315             
=========================================
- Hits         62914   62902     -12     
- Misses       13468   13480     +12     

see 7 files with indirect coverage changes

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[Copilot]

Pull request overview

This PR updates the repository’s formatting/linting tooling by switching shell-script checks from bashate to shfmt, and applies automated formatting changes across various shell scripts to match the new formatter’s output.

Changes:

• Replace bashate pre-commit hook with shfmt (and add shfmt to cspell dictionary).
• Reformat multiple shell scripts to shfmt style (indentation, spacing, redirections, etc.).
• Also bump several other pre-commit tool revisions (clang-format, gersemi, prettier, black, cspell).

Reviewed changes

Copilot reviewed 3 out of 14 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
package/shared/update-xrpld	Minor formatting adjustments consistent with shfmt.
package/build_pkg.sh	Reformats CLI parsing and staging logic to shfmt style.
cspell.config.yaml	Adds shfmt to allowed words.
bin/git/update-version.sh	Reformats script; still contains some unquoted-variable robustness issues.
bin/git/squash-branches.sh	Reformats script; still contains some unquoted-variable/echo robustness issues.
bin/git/setup-upstreams.sh	Reformats script (minor whitespace/redirect changes).
.pre-commit-config.yaml	Switches from bashate to shfmt and updates multiple other tool pins.
.github/scripts/rename/namespace.sh	Minor redirect formatting (&>/dev/null).
.github/scripts/rename/docs.sh	Minor redirect formatting (&>/dev/null).
.github/scripts/rename/definitions.sh	Minor redirect formatting (&>/dev/null).
.github/scripts/rename/copyright.sh	Minor formatting; still uses unsafe echo -e prepend pattern that can corrupt files.
.github/scripts/rename/config.sh	Minor redirect formatting (&>/dev/null).
.github/scripts/rename/cmake.sh	Minor redirect formatting and whitespace adjustments.
.github/scripts/rename/binary.sh	Minor redirect formatting (&>/dev/null).

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