feat: validate from uploaded file

[vitormattos]

Dependency added:

• poppler-utils

Was added as fallback to native PHP signature parser.

🏚️ Before	🏡 After

to-do

• Implement upload at frontend
• Create endpoint
• Add integration tests
• Match uploaded file with existing files
• Display data from uploaded file when not matched with existing files
• Display that have a newest version of uploaded file
• Details about signer
  • Sign date
  • Certificate chain
• Show more details about file
  • File size
  • Page counter
  • PDF version
  • Has the file been changed after signing?
  • PDF metadata
  • Signature hash used
  • Load certificate chain using poppler-utils

[vitormattos]

/backport to stable30

[vitormattos]

/backport to stable29

[backportbot-libresign]

The backport to stable29 failed. Please do this backport manually.

# Switch to the target branch and update it
git checkout stable29
git pull origin stable29

# Create the new backport branch
git checkout -b backport/4239/stable29

# Cherry pick the change from the commit sha1 of the change against the default branch
# This might cause conflicts, resolve them
git cherry-pick 1002f105 24a887af 75267492 11f16b14 f900fa83 214f4c27 859df10c 92aa3ddc 07d39d3b af51c3d1 054d0e53 d013ffb6 16dd18cf 9fa09107 4dcdb18e fb88965b 756263de db126976 0079f3c2 7e2f74d0 78d7ad15 9d5cb1f2 574e4ec3 8dd6d5ad 04feb06d a1dc48b8 97b9a224 5322fc0c 70e03c59 a139447f

# Push the cherry pick commit to the remote repository and open a pull request
git push origin backport/4239/stable29

Error: Failed to push branch backport/4239/stable29: fatal: could not read Username for 'https://github.com': No such device or address

---

Learn more about backports at https://docs.nextcloud.com/server/stable/go.php?to=developer-backports.

[vitormattos]

/backport to stable29

[backportbot-libresign]

The backport to stable29 failed. Please do this backport manually.

# Switch to the target branch and update it
git checkout stable29
git pull origin stable29

# Create the new backport branch
git checkout -b backport/4239/stable29

# Cherry pick the change from the commit sha1 of the change against the default branch
# This might cause conflicts, resolve them
git cherry-pick 1002f105 24a887af 75267492 11f16b14 f900fa83 214f4c27 859df10c 92aa3ddc 07d39d3b af51c3d1 054d0e53 d013ffb6 16dd18cf 9fa09107 4dcdb18e fb88965b 756263de db126976 0079f3c2 7e2f74d0 78d7ad15 9d5cb1f2 574e4ec3 8dd6d5ad 04feb06d a1dc48b8 97b9a224 5322fc0c 70e03c59 a139447f

# Push the cherry pick commit to the remote repository and open a pull request
git push origin backport/4239/stable29

Error: Failed to push branch backport/4239/stable29: fatal: could not read Username for 'https://github.com': No such device or address

---

Learn more about backports at https://docs.nextcloud.com/server/stable/go.php?to=developer-backports.