fix(esm): fix ESM types by adding .mts declaration files

[remarkablemark]

What is the motivation for this pull request?

fix(esm): fix ESM types by adding .mts declaration files

What is the current behavior?

No .mts files in esm directory

What is the new behavior?

.mts files in esm directory

Checklist:

• Conventional Commits
• Tests
• Documentation

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (dd0b253) 100.00% compared to head (ce09a65) 100.00%.

Additional details and impacted files

@@            Coverage Diff            @@
##            master     #1226   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            8         8           
  Lines          151       151           
  Branches        49        49           
=========================================
  Hits           151       151           

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[github-actions]

size-limit report 📦

Path	Size	Loading time (3g)	Running time (snapdragon)	Total time
dist/html-react-parser.min.js	9.19 KB (0%)	184 ms (0%)	20 ms (+147.35% 🔺)	204 ms