docs: add Jira Cloud setup guide for OpenHands Enterprise - #742

Running Vale across on the following files affected by this PR:

- enterprise/integrations/jira-cloud.mdx

Attempting to initialize Vale linter...
No customer vale configuration detected. Using Mintlify's default configuration.
Attempting to run Vale spellcheck...
Vale spellcheck completed successfully.

enterprise/integrations/jira-cloud.mdx:
	- 3:24      Did you really mean 'Jira'?
	- 7:36      Did you really mean 'Jira'?
	- 8:74      Did you really mean 'Jira'?
	- 13:1      Did you really mean 'Jira'?
	- 14:1      Did you really mean 'Atlassian'?
	- 20:3      Did you really mean 'Jira'?
	- 26:28     Did you really mean 'Jira'?
	- 30:20     Did you really mean 'Atlassian'?
	- 34:31     Did you really mean 'Jira'?
	- 49:13     Did you really mean 'Jira'?
	- 49:46     Did you really mean 'Jira'?
	- 50:54     Did you really mean 'rollout'?
	- 52:23     Did you really mean 'Jira'?
	- 57:69     Did you really mean 'Jira'?
	- 62:3      Did you really mean 'hostname'?
	- 65:21     Did you really mean 'Jira'?
	- 67:8      Did you really mean 'Jira'?
	- 76:28     Did you really mean 'Jira'?
	- 78:4      Did you really mean 'Jira'?
	- 82:61     Did you really mean 'Jira'?
	- 92:47     Did you really mean 'Jira'?
	- 95:35     Did you really mean 'Atlassian'?
	- 97:37     Did you really mean 'Atlassian'?
	- 99:42     Did you really mean 'Jira'?
	- 103:3     Did you really mean 'Atlassian'?
	- 116:46    Did you really mean 'Jira's'?
	- 129:49    Did you really mean 'Jira'?
	- 134:3     Did you really mean 'Atlassian'?
	- 135:24    Did you really mean 'Jira'?
	- 139:51    Did you really mean 'hostname'?
	- 145:61    Did you really mean 'Jira's'?


Found 31 suggested changes across 1 files in 480.90ms