Refactor function names in R/CHANGED-pre-msa-tree.R

[teddyCodex]

Description

Refactored functions in R/CHANGED-pre-msa-tree.R based on #7

Original	Modified	User Facing
convert_aln2fa	convertAlignment2FA	✅
to_titlecase	convert2TitleCase	✅
add_leaves	addLeaves2Alignment	✅
generate_all_aln2fa	generateAllAlignments2FA	✅
convert_aln2tsv	convertAlignment2TSV	✅
convert_accnum2fa	convertAccNum2FA	✅
add_name	addName	✅
map_acc2name	mapAcc2Name	✅
rename_fasta	renameFA	✅
acc2fa	acc2FA	✅

Fixes issue #37

What kind of change(s) are included?

• Feature (adds or updates new capabilities)
• Bug fix (fixes an issue).
• Enhancement (adds functionality).
• Breaking change (these changes would cause existing functionality to not work as expected).

Checklist

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• I have read and followed the CONTRIBUTING.md guidelines.
• I have searched for existing content to ensure this is not a duplicate.
• I have performed a self-review of these additions (including spelling, grammar, and related).
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• I have added a test which covers the code changes found within this PR.
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[teddyCodex]

@jananiravi @the-mayer
File containing other occurrences of the functions. Please let me know if I should commit this file as well.

function_occurrences.txt

[jananiravi]

convertAccNumber2FA --> convertAccNum2FA
mapAccession2Name --> mapAcc2Name

changes made in original issue #7 + this specific issue. could you double-check, @teddyCodex?

[teddyCodex]

@jananiravi changes for this file effected.

[the-mayer]

Thanks for your contributions, merging!