Add codewoners and PR template

Author: skotopes

.github/CODEOWNERS

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+# Who owns all the fish by default
+* @skotopes @DrZlo13 @hedger
+
+/avr_isp_programmer @skotopes @DrZlo13 @hedger @Skorpionm
+/dap_link @skotopes @DrZlo13 @hedger
+/hid_app @skotopes @DrZlo13 @hedger @nminaylov
+/mass_storage @skotopes @DrZlo13 @hedger @nminaylov
+/mfkey32 @skotopes @DrZlo13 @hedger @gornekich
+/nfc_magic @skotopes @DrZlo13 @hedger @gornekich
+/nfc_rfid_detector @skotopes @DrZlo13 @hedger @gornekich
+/picopass @skotopes @DrZlo13 @hedger @gornekich
+/signal_generator @skotopes @DrZlo13 @hedger @nminaylov
+/spi_mem_manager @skotopes @DrZlo13 @hedger
+/weather_station @skotopes @DrZlo13 @hedger @Skorpionm

.github/pull_request_template.md

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+# What's new
+
+- [ Describe changes here ]
+
+# Verification 
+
+- [ Describe how to verify changes ]
+
+# Checklist (For Reviewer)
+
+- [ ] PR has description of feature/bug or link to Confluence/Jira task
+- [ ] Description contains actions to verify feature/bugfix
+- [ ] I've built this code, uploaded it to the device and verified feature/bugfix