Add oca-crm submodule with 26 CRM modules

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Co-Authored-By: Claude <noreply@anthropic.com>

odoo-bringout-oca-crm-crm_lead_firstname/crm_lead_firstname/readme/CONTRIBUTORS.rst

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+* Rafael Blasco
+* Jairo Llopis
+* Raf Ven <raf.ven@dynapps.be>
+* Nikos Tsirintanis <ntsirintanis@therp.nl>

odoo-bringout-oca-crm-crm_lead_firstname/crm_lead_firstname/readme/DESCRIPTION.rst

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+This module extends the functionality of CRM leads to support split first and
+last name fields for contacts and allow you to port that information to and
+from partners.
+Since leads are expected to create partners only when needed and after
+information is correctly set up, in leads there is no inverse logic to
+transform the old single name in the new split names automatically. The old
+single name will simply be the firstname now.

odoo-bringout-oca-crm-crm_lead_firstname/crm_lead_firstname/readme/INSTALL.rst

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+To install this module, you need to:
+
+* Install `OCA/partner-contact <https://github.com/OCA/partner-contact>`_ repo.

odoo-bringout-oca-crm-crm_lead_firstname/crm_lead_firstname/readme/USAGE.rst

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+To use this module, you need to:
+
+* Go to *CRM > Leads > Leads > Create*.
+* You have the new split fields *Firstname* and *Lastname*. Fill them.
+* Press *Convert to Opportunity*.
+* In *Related Customer* choose *Create a new customer*.
+* Press *Create Opportunity*.
+* In the new opportunity, go to *Followup* tab. There are the new fields too.
+* If you go to the partner you just created, you will see that its first and
+  last names match those in the lead.